United States Patent 2675712
US Patent References:
Safety device for radial drills
- - 1477598

Microscope
- - 2057187

Drive mechanism
- - 2106088

Screw-threaded mechanical movement
- - 2446393

Antifriction nut and lead screw
- - 2478510


Publication Date:
04/20/1954
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Primary Class:
74/89.370
International Classes:
F16H25/20; F16H25/22
US Patent References:
2508261Antifriction screw device
Foreign References:
GB191117877A
DE343752C